CN114487569A - A kind of fresh-keeping equipment and safety device and safety method for the fresh-keeping equipment - Google Patents

Abstract

The invention relates to a fresh-keeping device, which comprises a cabin body and a high-voltage electric field generating device, wherein the high-voltage electric field generating device comprises at least one pair of electrodes arranged in the cabin body and used for generating an alternating high-voltage electric field, a storage space is formed between the electrodes, the fresh-keeping device also comprises a safety device, the safety device comprises an induction module, a cable and a current detection module, the induction module comprises an induction coil arranged on the inner side of the cabin body and connected with the cable, and the cable is connected with the current detection module. The invention also relates to a safety device and a safety method for the preservation equipment.

Description

A kind of fresh-keeping equipment and safety device and safety method for the fresh-keeping equipment

technical field

The invention relates to the technical field of fresh-keeping, in particular to a fresh-keeping device, a safety device and a safety method for the fresh-keeping device.

Background technique

Through cold chain logistics, people are now able to purchase fresher food in a shorter period of time. When a common refrigerated truck is transporting food and other goods that need to be kept fresh, the temperature in the cargo box is maintained at a lower temperature through the on-board refrigerator, so as to delay the process of spoilage and deterioration of the goods. In the continuous development of the cold chain logistics industry, fresh-keeping methods such as controlled atmosphere storage, refrigerated humidification, and refrigerated fresh-keeping have gradually emerged. However, studies have found that if the storage time exceeds two days, the effect of refrigeration and fresh-keeping is not good, and other additional technologies are needed to ensure that. Therefore, the high-voltage electric field-assisted preservation technology has gradually developed. On the basis of traditional refrigeration, alternating high voltage is applied to the freezer storage bin, and an environment of electrostatic field is formed through voltage vibration, which can maintain the "freshness" of these foods for a long time. This technology can also be applied to flowers, plants, biological tissues, etc. low temperature storage.

When using high-voltage electric field-assisted fresh-keeping technology on refrigerated trucks, the safety of high-voltage alternating electric fields should be considered. In addition to ensuring the reliability and quality of electromagnetic isolation during the manufacture and installation of such cabins, it is also necessary to monitor whether the relevant power supply equipment is operating normally and safely. However, the alternating high voltage in the cabin usually reaches thousands of volts. , it may cause an instantaneous extremely high potential difference between some parts of the stored items, item parts, packaging materials, etc. in the cabin, and the storage and handling of fresh-keeping items often change the position, plus the moisture and salt in the internal air and other factors. Under certain conditions, if the space distance is relatively short, discharge may occur, especially in such cabins during transportation, leakage and discharge and short-circuits are more likely to occur due to the displacement of items due to bumps in movement. This situation can have dangerous consequences. When a high-voltage electric field is applied, it is impossible for people to enter the internal space, and the monitoring of the working status of the power supply equipment cannot detect the existence of instantaneous discharge in time, especially during transportation.

SUMMARY OF THE INVENTION

In view of this, it is necessary to provide a fresh-keeping device and a safety device and a safety method for the fresh-keeping device.

A fresh-keeping device includes a cabin body and a high-voltage electric field generating device. The high-voltage electric field generating device includes at least a pair of electrodes arranged inside the cabin body for generating an alternating high-voltage electric field, and a storage space is formed between the electrodes. The fresh-keeping equipment also includes a safety The safety device includes an induction module, a cable and a current detection module, the induction module includes an induction coil arranged inside the cabin and connected with the cable, and the cable is connected with the current detection module.

Further, the induction module also includes a bushing and a mounting seat, the bushing is rotatably connected to the mounting seat and can be stopped at any angle, the mounting seat is fixedly installed on the inside of the cabin, the induction coil is passed through the bushing, and is connected from the inside of the cabin. Both ends of the sleeve extend out to be connected with the cable.

Further, a plurality of induction coils and corresponding cables are arranged in the cabin, each induction coil is assigned a number, and the current detection module identifies each induction coil according to the number.

Further, a shielding layer is also provided on each surface of the inner side of the cabin, and the mounting seat is installed on the inner side of the shielding layer.

A safety device for fresh-keeping equipment. The fresh-keeping equipment includes a cabin body and a high-voltage electric field generating device. The high-voltage electric field generating device includes at least a pair of electrodes arranged inside the cabin body for generating an alternating high-voltage electric field, and a storage device is formed between the electrodes. In the space, the safety device includes an induction module, a cable and a current detection module. The induction module includes an induction coil arranged inside the cabin and connected to the cable, and the cable is connected to the current detection module.

Further, the induction module also includes a sleeve and a mounting seat, the sleeve is rotatably connected to the mounting seat and can be stopped at any angle, the mounting seat is fixedly installed on the inside of the cabin, and the induction coil is passed through the sleeve. inside the tube, and extend from both ends of the sleeve to connect with the cable.

Further, a plurality of induction coils and corresponding cables are arranged in the cabin, each induction coil is assigned a number, and the current detection module identifies each induction coil according to the number.

Further, a shielding layer is also provided on each surface of the inner side of the cabin, and the mounting seat is installed on the inner side of the shielding layer.

A safety method for fresh-keeping equipment, comprising the following steps:

Every time the high-voltage electric field generating device is turned on and reaches a steady state, the current detection module detects and records the normal amplitude of the induced current of at least one high-voltage alternating cycle of each induction coil, and sets a threshold value;

Detect the change value of the current amplitude of the induction coil during the working process;

comparing whether the detected change in the amplitude of the induced current and the normal amplitude of the current exceeds a corresponding threshold; and

If it exceeds, the current detection module will send an alarm signal and indicate the abnormal position.

Further, the security method also includes:

Adjust the angle of the induction coil before recording at least one cycle of the normal amplitude of the induced current.

The fresh-keeping equipment and the safety device and safety method used for the fresh-keeping equipment of the present invention detect the change of the induced current of the induction coil by the current detection module, so as to timely find out whether there are safety problems such as abnormal discharge, short-circuit overcurrent and the like in the cabin; Arranging a number of induction coils and assigning an ID number to each induction coil can not only expand the detection space, but also locate abnormal positions in time to speed up troubleshooting. The angle can not only avoid collision with the cargo inside the cabin, but also can be adjusted to the best angle for cutting the magnetic line of force, making the induction more sensitive and more accurate; the detection of the induced current change of the induction coil with the help of the current detection module also helps Find out whether the power supply equipment is in normal working condition in time to ensure the timely detection of abnormal conditions.

Description of drawings

FIG. 1 is a schematic diagram of a fresh-keeping device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the sensing module of FIG. 1 .

FIG. 3 is a flow chart of a safety method for the preservation device of FIG. 1 .

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Please refer to FIG. 1 and FIG. 2 together, which is a fresh-keeping device 100 according to an embodiment of the present invention, including a cabin 10 , a shielding layer 20 , a high-voltage electric field generating device (not shown) and a safety device 40 . The shielding layer 20 is covered on each surface 12 of the cabin body 10 .

In this embodiment, the cabin body 10 is a six-sided cuboid freight container, and the six sides 12 of the cabin body 12 are covered with shielding layers 20 to reduce or prevent the high-voltage electric field radiation of the cabin body 10 from affecting the external environment, equipment and equipment of the cabin body 10 . adverse effects on passengers.

The high-voltage electric field generating device is used to generate a high-voltage electric field, and includes at least a pair of electrodes 32, a power source and a boosting module (not shown in the figure). A storage space for storing items to be kept fresh (such as vegetables, meat, flowers, plants, biological tissues, etc.) is formed between them. Specifically, the pair of electrodes 32 can be placed up and down, left and right, or opposite to each other.

The safety device 40 includes a sensing module 42 , a cable 44 and a current detection module 46 .

The induction module 42 includes an induction coil 420 , a sleeve 422 and a mounting seat 424 . The induction coil 420 is a conductive coil capable of magnetic field induction, and may be made of a metal wire or a material of a good high-voltage electric field generating device, and the plane where the induction coil 420 is located is passed through by magnetic lines of force. The sleeve 422 is sleeved on the periphery of the induction coil 420 . The sleeve 422 can be U-shaped, C-shaped or other shapes with one side open. The cabin body 10 may be made of a metal material or a non-metal material. In one embodiment, the cabin body 10 is made of a metal material and has a shielding function. The shielding layer 20 provided separately can be omitted, and the mounting seat 424 can be directly installed Inside the cabin 10 .

The sleeve 422 is mounted on the mounting seat 424, and the mounting seat 424 is provided with a hinge (not shown), the sleeve 422 and the induction coil 420 penetrated in the sleeve 422 can rotate together around the hinge axis, so as to be relative to the surface 12 can be rotated and can stay at any angle, so that not only the cargo in the cabin 10 can be avoided, but also the induction coil 420 can be easily adjusted without being affected by the surface shape of the shielding layer 20 to have a better induction effect with the magnetic field lines. The number of induction coils 420 is not limited to one, and multiple induction coils 420 can be set in the cabin 10. Each induction coil 420 has an identification number and corresponds to the installation position in the cabin 10 where it is located. The current detection module 46 can sense everywhere. The change of the current amplitude sensed by the coil 420 is monitored by value, so that the change of the electromagnetic environment in the cabin 10 can be detected more accurately and quickly, and the abnormal point can be quickly located when an abnormality is found, which is convenient for danger investigation and maintenance. The induction coil 420 is insulated from the shielding layer 20 .

The cable 44 passes through the shielding layer 20 and is insulated from the shielding layer 20, and is respectively connected to the induction coil 420 and the current detection module 46 disposed outside the cabin 10 to form an induction current loop. Cable 44 may be a shielded cable.

The current detection module 46 has the functions of comparison and alarm signal reporting, and can test the current amplitude of the induction coil 420 . When an alternating high voltage (or pulsed high voltage) is applied by the oppositely arranged high voltage electric field generating device, the alternating electric field in the cabin 10 will generate a corresponding alternating magnetic field, so that the induction coil 420 in the cabin 10 generates an induced current, and the induction coil 420 The generated induced current is transmitted to the current detection module 46 outside the cabin 10 through the cable 44 . The alternating electric field and the induced current have the same variation law. If the variation law of the electric field is stable (in a steady state), the variation law of the induced current is also stable. If there is a sudden discharge phenomenon in the electric field environment, the electric field situation will change accordingly, and the induced current of the induction coil 420 will also change accordingly. The more obvious the induced current of the induction coil changes.

It is regarded as a normal working state after the alternating high voltage of the high-voltage electric field generating device in the cabin 10 is activated or entering a steady state every time the door of the cabin 10 is opened and closed. At this time, at least one cycle of each of the several induction coils 420 is recorded. The amplitude of the induced current is compared with the amplitude of the induced current in the later work. Under normal circumstances, the variation period characteristic of the induced current is consistent with the variation period characteristic of the high voltage electric field in the cabin 10, and is in a stable and regular state like the alternating high voltage electric field. When an abnormality occurs, a sudden discharge arc occurs near the induction coil 420 inside the cabin 10, or an abnormal short-circuit current occurs locally, or when the voltage of the high-voltage electric field generating device is abnormal, the magnetic flux passing through the induction coil 420 will change. The amplitude of the induced current changes accordingly, and the abnormally changed induced current is transmitted to the current detection system 46 through the cable 44 and measured by the current detection system 46 . When the amplitude difference of the induced current (including the instantaneous sudden change difference) of one or several induction coils 420 exceeds the preset threshold, the current detection module 46 sends an alarm signal, and at the same time gives the induction coil where the abnormal induction current signal is located. The number of 420 indicates the location of the abnormal point. The driver and passengers can find the abnormality of the electromagnetic environment inside the cabin 10 in time, and immediately carry out safety inspection and emergency treatment. In addition, the alarm signal can be transmitted to the background monitoring center through the communication network, etc. In order to further investigate and deal with vehicles with potential safety hazards.

Please refer to FIG. 3, which is a safety method for the above-mentioned fresh-keeping device according to an embodiment of the present invention, including the following steps:

A safety method for fresh-keeping equipment, comprising the following steps:

Every time the high-voltage electric field generator is turned on and works in a steady state, the current detection module detects and records the normal amplitude of the induced current of at least one high-voltage alternating cycle of each induction coil, and sets the corresponding threshold;

Detect the change value of the current amplitude of the induction coil during the working process;

comparing whether the detected change in the amplitude of the induced current and the normal amplitude of the induced current exceeds the corresponding threshold; and

If it exceeds, the current detection module will send an alarm signal and indicate the abnormal position.

Further, the safety method for the fresh-keeping device according to the embodiment of the present invention further includes the step of: adjusting the angle of the induction coil before recording the normal waveform value of the induced current for at least one cycle.

The fresh-keeping equipment and the safety device and safety method used for the fresh-keeping equipment of the present invention detect the change of the induced current of the induction coil by the current detection module, so as to timely find out whether there are safety problems such as abnormal discharge, short-circuit overcurrent and the like in the cabin; Arranging a number of induction coils and assigning an ID number to each induction coil can not only expand the detection space, but also locate abnormal positions in time to speed up troubleshooting. The angle can not only avoid collision with the cargo inside the cabin, but also can be adjusted to the best angle for cutting the magnetic line of force, making the induction more sensitive and more accurate; the detection of the induced current change of the induction coil with the help of the current detection module also helps Find out whether the power supply equipment is in normal working condition in time to ensure the timely detection of abnormal conditions.

The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced. Without departing from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A fresh-keeping device, comprising a cabin body and a high-voltage electric field generating device, the high-voltage electric field generating device comprising at least a pair of electrodes arranged inside the cabin body for generating an alternating high-voltage electric field, and forming an alternating high-voltage electric field between the electrodes. The storage space is characterized in that: the fresh-keeping equipment further includes a safety device, and the safety device includes an induction module, a cable and a current detection module, and the induction module includes a device located inside the cabin and connected to the The induction coil is connected with a cable, and the cable is connected with the current detection module. 2. The fresh-keeping device according to claim 1, wherein the induction module further comprises a sleeve and a mounting seat, and the sleeve is rotatably connected to the mounting seat and can be stopped at any angle, The mounting seat is fixedly installed on the inside of the cabin, the induction coil is passed through the sleeve, and extends from both ends of the sleeve to be connected with the cable. 3. The fresh-keeping device according to claim 1, wherein a plurality of induction coils and corresponding cables are arranged in the cabin, and each induction coil is assigned a number, and the current detection module is based on the A number identifies each of the induction coils. 4 . The fresh-keeping device according to claim 2 , wherein a shielding layer is further provided on each surface of the inner side of the cabin, and the mounting seat is installed on the inner side of the shielding layer. 5 . 5. A safety device for fresh-keeping equipment, the fresh-keeping equipment comprises a cabin, a high-voltage electric field generating device, and the high-voltage electric field generating device includes at least a pair of electrodes arranged inside the cabin for generating alternating currents. A high-voltage electric field, a storage space is formed between the electrodes, and it is characterized in that: the safety device includes an induction module, a cable and a current detection module, and the induction module includes a module arranged inside the cabin and connected to the The induction coil is connected with a cable, and the cable is connected with the current detection module. 6 . The safety device for fresh-keeping equipment according to claim 5 , wherein the sensing module further comprises a sleeve and a mounting seat, and the sleeve is rotatably connected to the mounting seat and is rotatable. 7 . Stopping at any angle, the mounting seat is fixedly installed on the inside of the cabin, the induction coil is passed through the sleeve, and extends from both ends of the sleeve to be connected to the cable. 7 . The safety device for fresh-keeping equipment according to claim 5 , wherein a plurality of induction coils and corresponding cables are arranged in the cabin, and each induction coil is assigned a number, and the current detection The module identifies each of the induction coils according to the number. 8 . The safety device for fresh-keeping equipment according to claim 6 , wherein a shielding layer is further provided on each surface of the inner side of the cabin, and the mounting seat is installed on the inner side of the shielding layer. 9 . 9. A safety method for the fresh-keeping device of one of claims 1 to 4, comprising the steps of: Every time the high-voltage electric field generating device is turned on and works to reach a steady state, the current detection module detects and records the normal amplitude of the induced current of at least one high-voltage alternating cycle of each of the induction coils, and sets a threshold value; Detecting the current amplitude change value of the induction coil during operation; comparing whether the detected change in the amplitude of the induced current and the normal amplitude of the current exceeds a corresponding threshold; and If it exceeds, the current detection module sends out an alarm signal and indicates the abnormal position. 10. The security method of claim 9, wherein the security method further comprises: Adjust the angle of the induction coil before recording at least one cycle of the normal amplitude of the induced current.

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